20161268 Ver 2_U-4751 Waterline Modification_20190402

Carpenter, Kristi
From:
Herndon, T. Mason
Sent:
Tuesday, April 02, 2019 1:58 PM
To:
Shaver, Brad ; Steenhuis, Joanne; Lane, Stephen
Subject:
U-4751 Waterline Modification
Attachments:
U-4751 Utility WIS 20190402.pdf, U4751_Rdy_dsn -
Copy -Utility Permit Mod Site 1_c2.pdf
The resident engineer's office has brought an issue to my attention regarding the
permitted impacts for the waterline relocation on U-4751 on-Y1RPD- 11+07.63 to
15+04.47. The original impacts for installing the proposed 8" waterline was only 6 ft in
width for temporary excavation and temporary fill. This would not even allow enough
width to lay the slopes back for the excavation to meet safety standards for trenching or
have enough area to operate the machinery.
Now that the waterline has been revised to a 16" line there is definitely not enough
permitted area to install the waterline. We have run the numbers based on the
required trench depth and slopes to determine that 0.1 acres of temporary excavation is
actually required to install the waterline at utility Site 2 (the original permitted temp.
excavation for this site was 0.02 ac). An additional 0.01 ac of temporary fill is also
required also required at utility Site 2 for this work. Because the temporary excavation
will extend into the previously permitted HC for the aerial utility line, the HC for utility
Site 1 will decrease to 0.16 ac (originally 0.17 ac).
Attached is a revised permit drawing for the waterline labeled as NES 05A and an
updated WIS dated 4/2/19 with the revised impact numbers. I have discussed this at
length with Jimmy and the contractor has agreed to place the temporary fill on fabric so
the original natural ground elevation can easily be restored. The RE office and
contractor are also aware that the material excavated from the trench must be placed
back in the manner that it was excavated with the organic material being placed back on
top of the trench and at the same elevation as the adjacent wetlands.
Since this revision only pertains to proposed temporary impacts and does not require
additional mitigation, I was unsure if we needed to pursue a formal permit modification
or if this e-mail and attached documents were sufficient documentation. We can
discuss this more on Thursday if needed, but I need to process this as quickly as possible
because the contractor is on hold and we need to get this work completed prior to
putting traffic on this facility.
If you have any questions or require any additional information to process this request,
please do not hesitate to contact me.
Mason Herndon
Environmental Program Supervisor
Division 3
NCDOT- Division of Highways
910-341-2036 office
910-604-0050 mobile

[e-mail]
5501 Barbados Blvd
Castle Hayne, NC 28429
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